At what voltage would a 9 μF capacitor have the energy to lift 3 grams by 1 cm?

Question

i understand i need the0.5CV^2 equation however I don't know how to answer this

Answer 1

so how many Joules do you need?

potential energy = m g h

= 3 *10^-3 *9.81* 10^-2 = .5*9*10^-6 V^2

30*9.81 = .5*9 V^2